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New composition with enhanced luminescence

一种组合物、混合物的技术，应用在发光材料、分拣、印刷等方向，能够解决不足以提供成本/效率比、不提供长期化学稳定性等问题

Active Publication Date: 2019-01-29
KARLSRUHER INST FUR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these materials contain sulfur (oxysulfides) or hydrolyze slowly (in the case of fluorides), i.e., do not provide long-term chemical stability
A chemically stable ternary oxide exhibits a PLQY of 2.4%, however, this is insufficient to provide a good cost / efficiency ratio for applications in the field of photonic markers

Method used

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  • New composition with enhanced luminescence
  • New composition with enhanced luminescence
  • New composition with enhanced luminescence

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] According to the above general procedure to prepare the chemical formula M 2(1-y-z) Yb 2y Rem 2z ADO 5-x Hal 2x A composition wherein M=Y, Rem=Er, A=Ba, D=Zn, Hal=F, y=0.12, z=0.035 and x=0 or x=0.1. With the aid of a 980nm laser diode at 1.5W / cm 2 The upconverting emission spectrum of the composition was recorded after excitation at a power density of .

[0093] figure 1 The up-converting (UC) emission spectrum of the composition from 500 to 700 nm is shown (dashed line: x=0; solid line: x=0.1). Compositions of the invention (x=0.1 ) showed increased UC emission intensity observed at 674 nm. figure 1 It is clearly shown that by partially substituting oxygen with fluorine, the UC emission intensity is significantly increased compared to prior art compositions (where x=0).

Embodiment 2

[0095] According to the above general procedure to prepare the chemical formula M 2(1-y-z) Yb 2y Rem 2zADO 5-x Hal 2x A composition wherein M=Y, Rem=Er, A=Ba, D=Zn, Hal=F, z=0.07, x=0.1 and y is variable. With the aid of a 980nm laser diode at 1.5W / cm 2 The upconverting emission spectrum of the composition was recorded after excitation at a power density of .

[0096] figure 2 The effect of Yb content on the green / red ratio in the up-converting (UC) emission spectra of compositions with variable y is shown. UC red emission intensity was observed at 674 nm and UC green emission intensity was observed at 548 nm. figure 2 It clearly shows that the red / green ratio can be tuned by the Yb content.

Embodiment 3

[0098] According to the above general procedure to prepare the chemical formula M 2(1-y-z) Yb 2y Rem 2z ADO 5-x Hal 2x The composition, wherein, M=Y, A=Ba, D=Zn, Hal=F, y=0.12, z=0 and x=0 or x=0.1. The downshifted emission spectrum of the composition was recorded after excitation by means of a 940 nm laser (see image 3 ; dotted line: x=0; solid line: x=0.1). image 3 showed that the downshifted emission could be enhanced by partial substitution of oxygen with fluorine.

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Abstract

The present invention relates to a composition for photoluminescence of the chemical formula M2(1-y-z)Yb2yRem2zADO5-xF2x, a method for producing said composition, and uses of said composition.

Description

technical field [0001] The present invention relates to a chemical formula M 2(1-y-z) Yb 2y Rem 2z ADO 5-x Hal 2x A composition for photoluminescence, a method for preparing the composition, and an application of the composition. Background technique [0002] Photoluminescence is the emission of photons resulting from direct photoexcitation of any form of matter following absorption of photons (electromagnetic radiation). Photoluminescence may include down-shifting or up-conversion processes. If the energy of the emitted photon is less than that of the absorbed photon, photoluminescence is described as a downshift process. In contrast, photon upconversion is an optical process in which photons with low energy are converted into photons with higher energy within some optical medium. The downshift and upconversion processes in a solid host matrix doped with rare-earth element ions (“Rem”) under activation by visible, near-infrared (NIR), or infrared (IR) light are based...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78C09K11/86
CPCC09K11/7769C09K11/7773B41M1/04C09K11/777C09K11/7788B07C5/342B07C5/362B07C5/367G01N21/85
Inventor 德米特里·布斯科高国军伊恩·霍华德布莱斯·理查兹安德烈·图尔沙托夫
Owner KARLSRUHER INST FUR TECH
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